Ben Tennyson, his cousin Gwen, and Grandpa Max travel the country for summer vacation. When Ben finds the Omnitrix, a mysterious watch that transforms him into 10 different aliens, a world of extraterrestrial superpowers opens up before him.
Team Tennyson enjoy the biggest convention in town, but when a gawky costume store employee finds a familiar-looking helmet in the back of the store and tries it on, Ben is faced with the return of an old foe in a new form: Forever Knight!Watch Now:iTunes
Max tries to be with Ben and Gwen before sunset at the Four Corners Monument, but suddenly heavy fog descends on the street and the motor home is attacked.
When Ben and Gwen visit Fort Knox, the villainous Charmcaster appears, seeking revenge for Michael Morningstar; Gwen faces off against Charmcaster to prove her worth to the team.
Left to entertain himself, Ben stumbles upon a Xingo arcade game and goes OE-Shock Rock to power it up; when the game receives too much juice, Xingo leaps out into the real world. Air date from Germany
While Gwen and Max are enamored by wintertime fun during the summer, Ben isn't interested until the Weatherheads attack, intent on feeding off the emotional energy caused by destroying the town.
While Gwen listens to a lecture on the Transcontinental Railroad, Ben sneaks away to the gift shop; Gwen must relay the information she learned on the train to help Ben escape the Bounty Hunters.
A mysterious alien substance copies Ben's appearance and powers while Ben is visiting a space museum, and quickly assumes the shape of other people, leaving the Tennysons to find a way to reveal who is actually the mysterious substance.
Ben, Max, and Gwen say Ben might be a better hero if he could act alone, but Vilgax teams up with Zombozo and creates a huge monster to hypnotize the whole world.
Ben, Gwen and Grandpa Max stop in the middle of the Midwest. While Ben makes himself comfortable in the mobile home with his tablet, Max and Gwen go outside to get some fresh air. When Gwen and Max are drawn into the hunt for a Jackalope, a mythical animal that looks like a rabbit with antlers, the mysterious animal soon starts tormenting Ben. But is it real or a trick of Ben's tablet-ladden mind? Air date from the UK
Ben is shocked to discover that Steam Smythe has built steampunk robots capable of masquerading as and matching Ben's aliens, hoping to discredit the hero's ever-growing popularity and simultaneously helping his crusade against modern technology.
Ben and Gwen are stoked to enter a skating competition, but when Nanny Nightmare shows up to teach the skater kids some manners by turning them into babies, it's up to Team Tennyson to up their game if they are to have any chance at saving the day.
When Hex mistakes an exclusive magic club for a top-secret Wizard society that snubbed him, Ben has to figure out how to work around the club's strict code of conduct to stop him without getting booted by security.
When Max enters a pancake eating contest at the famous Pancake Palace, Ben finds the Bugg Brothers and must stop them before they obtain an endless supply of Pancake Palace pancakes. Air date from the UKWatch Now:iTunes
Team Tennyson discovers that a small village's goats are being terrorized by the legendary Chupacabra, but when Ben realizes it's actually Dr. Animo, our hero must thwart the dastardly doctor before he uses the essence of the goats to power up into an unstoppable form!Watch Now:iTunes
Team Tennyson heads to the Okefenokee Swamp to witness the blooming of the Blushing Orchid, something that happens once every one hundred years. But their plans get disrupted when Tim Buk-Tu, trying to make his new 'reality' show more exciting, endangers the rare flower and everyone else at the swamp.
On their trip to Adrenaworld West, Ben takes a detour on a jungle cruise and finds himself hunted by the evil Tim Buktu. Air date from the UKWatch Now:iTunes
While sightseeing at the Geyser Gulch National Park, the Tennyson trio uncovers Steam Smythe's steam-powered generator and must shut it down before it overloads the power grid. Air date from the UKWatch Now:iTunes
At the Mojave Wind Farm in Texas, Max and Gwen plan to set Ben straight on his kooky ideas about how wind works, but when they find the Weatherheads using the towering turbines for their latest nefarious plan, will Ben face facts in time to blow them away?
Zombozo returns with the Circus Freaks, (Frightwig, and 2 new members, Thumbskull and Acid Breath) with a new plan to turn everyone into clowns like him. Air date from the UK
Touring Yellowstone National Park, Ben uncovers a plot by Lagrange who wants to digout an old treasure from below the national park. Air date from the UK
During a live feed of a transcontinental bullet train, La Grange enters the picture to outrace the train, but Ben joins in on the fun and will stop at nothing to come out on top. Air date from the UKWatch Now:iTunes